Part A
AD8346ARU
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2410 PCS
- Package
- TSSOP-16
- Series
- Moduladores RF
Replacement verdict
Not a drop-in replacement
The AD8346ARU and AD834JRZ are not drop-in replacements for one another. The AD8346ARU is a 2.5 GHz quadrature modulator, while the AD834JRZ is a 500 MHz four-quadrant analog multiplier. They differ in core function, frequency range, package, and supply requirements, so substituting one for the other requires a full circuit redesign rather than a direct swap.
Different function
Different frequency range
Different package
Different supply voltage
Parts at a glance
Part B
AD834JRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4596 PCS
- Package
- SOIC-8
- Series
- Linear - Multiplicadores analógicos, Divideres
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8346ARU | AD834JRZ | Why it matters |
|---|---|---|---|
| Function | Quadrature modulator (I/Q modulator), 0.8 GHz to 2.5 GHz | Four-quadrant analog multiplier (Gilbert cell multiplier/divider) | These are fundamentally different device types, so they are not functionally substitutable in a circuit. |
| Frequency / Bandwidth | 0.8 GHz to 2.5 GHz RF output range | DC to 500 MHz input bandwidth | Operating frequency range determines whether the part can be used in the target signal chain. |
| Package | 16-lead TSSOP (RU suffix) | 8-lead SOIC (RZ suffix) | Different package and pin count affect PCB footprint and cannot be drop-in replaced. |
| Supply Voltage | 2.7 V to 5.5 V single supply | ±4 V to ±9 V dual supply (or equivalent single supply) | Supply requirements must match the board's power rails for the device to operate correctly. |
| Output Type | Modulated RF output (single-ended/differential RF) | Analog current/voltage product output (W = X×Y) | The output signal format determines compatibility with downstream circuitry. |
| Input Configuration | Differential baseband I and Q inputs with LO input | Differential X and Y analog inputs | Input topology dictates how the device interfaces with preceding stages. |
| Typical Application | Digital and analog cellular infrastructure, wireless local loop, RF modulation | Analog signal multiplication, division, squaring, modulation, gain control | Intended application reveals whether the part fits the design's functional role. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both share the same industrial temperature range, so thermal environment is not a differentiator. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8346ARU | AD834JRZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Function | Modulator | Analog Multiplier |
| Number of Bits / Stages | - | 4-Quadrant |
| LO Frequency | 800MHz ~ 2.5GHz | - |
| RF Frequency | 800MHz ~ 2.5GHz | - |
| P1d B | -3dBm | - |
| Noise Floor | -147dBm/Hz | - |
| Output Power | -6dBm | - |
| Supply Current | 55 mA | - |
| Voltage - Supply | 2.7V ~ 5.5V | - |
| Test Frequency | 1.9GHz | - |
Frequently asked questions
Are the AD8346ARU and AD834JRZ functionally interchangeable?
No. The AD8346ARU is a 2.5 GHz quadrature modulator, while the AD834JRZ is a 500 MHz four-quadrant analog multiplier. They serve different signal-processing functions and cannot be substituted for one another.
What are the core functions of the AD8346ARU and AD834JRZ?
The AD8346ARU is a direct-conversion quadrature modulator that upconverts baseband I/Q signals to an RF output. The AD834JRZ is a four-quadrant analog multiplier that computes the product of two analog input voltages.
How do the operating frequency ranges of the AD8346ARU and AD834JRZ compare?
The AD8346ARU operates over an RF output range of 0.8 GHz to 2.5 GHz. The AD834JRZ is specified for operation up to 500 MHz. The AD8346ARU therefore targets higher-frequency RF modulation, while the AD834JRZ targets lower-frequency analog multiplication.
Do the AD8346ARU and AD834JRZ use the same package and pinout?
No. The AD8346ARU is supplied in a 16-lead TSSOP package, and the AD834JRZ is supplied in an 8-lead SOIC package. Their pin counts, pin functions, and PCB land patterns differ, so they are not footprint-compatible.
What are the supply voltage requirements for the AD8346ARU and AD834JRZ?
The AD8346ARU operates from a single 2.7 V to 5.5 V supply. The AD834JRZ operates from a dual ±4 V to ±9 V supply. The supply architectures are fundamentally different and require different board-level power designs.
What are the typical application areas for the AD8346ARU versus the AD834JRZ?
The AD8346ARU is used in RF transmitters, direct-conversion modulators, and wireless infrastructure for I/Q upconversion. The AD834JRZ is used in analog signal processing such as gain control, modulation, mixing, and voltage-controlled amplification at lower frequencies.
Can the AD8346ARU and AD834JRZ be used together in a single signal chain?
Yes, in principle they can serve different stages of a system: the AD834JRZ can perform low-frequency analog multiplication or gain control, and the AD8346ARU can perform RF quadrature upconversion. Each device must be designed into its appropriate frequency and supply domain per its datasheet.